Improvement in bevel-squires



w.-T. F-SHER Bevelv Square. No. 79,062. Patemedune 23, 1868.

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i i Letters Patent No. 79,962, dated June 23, 1868.

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TO ALL WHOM IT MAY CONCERN:

Be it known that l, W. T. FISIIEI'., ofLcnoir's, in the county of Renne,and State of Tennessee, have invented la new and useful Improvement inBorol-Squares; and I do hereby declare that the following is a full,clear, and

exact description thereof, which will enable others skilledin the art to-mako and use the same, reference being had to the accompanyingdrawings, forming-part of this specification, in which- Figures 1, 2,and 3 are side views of my improved instrument, showing it in dilTe-entpositions, and illustrating some of the uses to which it is applicable.

Similar letters of reference indicate like parts.

My invention has for its object to furnish an improved tool, simple inconstruction, easy of adjustment, and

convenient i use, -conbining within itself many of the separate toolsnow necessarily used in every work-shop,`

such as a bevel-square, right-angle square, plumb and level, and whichmay also be used for measuring heights and distanccs, taking angles, andso forth ;i and it consists'in `the construction and combination of thevarious parts as hereinafter more fully described.

A is the stock, which is made with a longitudinal groove in its face, ofsufiicient depth toallow the blade B to shut np.into it, as shown infig. 1. I

C is a spirit-bottle, enclosed in theedge of the stock A, so that whenthe blade B is shut into the said stock, the instrument may be used as alevel.

The blade is laid ofi' into scales upon one or both sides, and upon' oneor both edges, so that the 'said 'blade may be used for measuringadjusting-gauges or oth`ertools, Soc.

The blade B, near its upper end, is pivoted to the upper end of thestock A, as shown in the drawings, so lthat it may be shut into thestock A, as shown in fig. 1, or opened out, as shown in figs.2 and3,'according to the particular use to which the instrumentjs to'beapplied. di l D is a eircular protractor, which is pivoted to the bladeB and stock Aby the same pivoting-pin that pivots the said blade to thesaid stock, said pivoting-pin passing through the centre of the circleof which the protractor D is a part. .1

The protractor D is slottedinrith acircular slot near ts outer edge,through which slot pass the thumb= screws E and F, the thumb-screw Escrewiig into the blade B, to clamp the said protractor to the 'saidblade, and the thumb-screw F screwing into a nut lin a recess in theunder part of the stock A, so that, by turning the said screw forward,the said nut may be drawn against the lower side ofthe saidprotractor,'securely clamping it to the said stock.

The circular edge of the protractor D is divided off into a scale in theordinary manner, and in the side of the stock A, directly over the saidscale, is formed a hole, in which is secured an index-finger, Gr,pointing to the division-marks of said scale.

H is an index-finger, attached to the upper end of the blade B, in sucha position as to point to the division-v marks of the said scale, asshown in the drawings. w

When the instrumentis to be used as a plumb, or for any other purposewhich requires the use of the outer edge of the blade B, the protracto ris turned into the position shown in fig. 3. When, for s uch use, thebladcB is required to bc at right angles to the stock A, the protraetorD is brought into such a position that the indexinger G may point to thedivision-mark 90 of the scale, Where it is clampcd by means of the screwF. The blade B is then adjusted so that the index-finger H may point tothe O-mark of the said scale, where it is secured by the screw E. VIn asimilar manner, the blade B may be adjusted to stand at anv desiredangle with the stock A. i

When the instrument is to bc used as a try or bcvcl-square, or for anyother purpose that requires the use of the inner edge of the blade B,the protractor D is turned into the position shown`` in fig. 2. When,for such use, the blade B is required to stand at right angles to thestock A, the said protrvactor is clampcd to the stock A in such a`position 'that tie'index-finger Gr may point to `tle O-narl: oftleseale.l l`he blade B is then adjusted and clamped in such a positionthat the index-linger II may point to the 90-mark of said scale.

i In a similar manner the blade Il may be adjusted to stand atany'desir'ed angle to the stock A, according to the requirements oftheparticular use to which the instrument is to be applied.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent- 1. The arrangement of the fixed index, G,- andmovable indeir, H,flivitl1 relation to each other, and the stock A,graduated blade B,'and slotted protraetor D, wliereby the. requiredangle of the blade with the stock is determined, as herein shown anddescribed. I I

,2. The described arrangement of the slotted stock A, graduated blade13, slotted protraetor D, fixed indexfinger G, inovable index-finger H,and set-screws E F, all operating as described, for the purposesspecified.

4 W. 'r. FISHER..

Witnesses:

Gr. W. FoNTn, GEORGE NenoLs.

